import { Link, useHistory } from 'react-router-dom'
import styles from './index.module.scss'

import { useState, useEffect, useRef } from 'react'

const NotFound = () => {
  const [count, setCount] = useState(5)
  const timerRef = useRef(-1)
  const history = useHistory()

  useEffect(() => {
    timerRef.current = setInterval(() => {
      setCount((count) => count - 1)
    }, 1000)
    return () => {
      clearInterval(timerRef.current)
    }
  }, [])

  useEffect(() => {
    if (count === 0) {
      history.replace('/home')
    }
  }, [count, history])

  return (
    <div className={styles.root}>
      <h1>对不起，您访问的页面不存在~</h1>
      <p>
        将在 {count} 秒后返回首页（或者点击立即 <Link to="/home">返回首页</Link>
        ）
      </p>
    </div>
  )
}

export default NotFound
